We don't think of caffeine being a mood-altering legal drug but it sure is! Caffeinated products like coffee, soda and tea are the most widely used drug in the world. Caffeinated products are in the top 20 of the most drugs used. This includes cocaine, cannabis, magic mushrooms and amphetamines! When we have 1,000 milligrams or more of caffeine a day it may lead to depression. Too much caffeine may additionally lead to insomnia, anxiety, muscle spasms and some heart problems. With 85 percent of Americans consuming one caffeinated cup of coffee per day, no wonder why we are addicted to this drug.